Gauge to Inches/mm Conversion Table
Gauge (Ga.) is a different type of measurement from inches or millimeters, and there is no formula for conversion between them.
Sheet metals gauge indicates the standard thickness of sheet metal. As opposed to inches or millimeters, the lower the gauge number the thicker the sheet.
In the US market it is common to use the Ga. for expressing gold and silver thicknesses.
Below is a conversion table Gauge-Inches-Millimeters.
Below attached conversion table Ga.-Inches-mm.